<template>
    <div class="login_box">
        <div class="login_form">
            <div class="logo">
                <img src="../assets/logo.png">
            </div>
            <el-form ref="loginFormRef" label-width="0px" :model="loginForm" :rules="loginRules">
                <el-form-item prop="username">
                    <el-input v-model="loginForm.username" prefix-icon="el-icon-user-solid"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input v-model="loginForm.password"></el-input>
                </el-form-item>
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>
<script>
export default {
  data () {
    return {
      // 登录表单的数据绑定对象
      loginForm: {
        username: '',
        password: ''
      },
      // 表单验证规则
      loginRules: {
        username: [{ required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur' }],
        password: [{ required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 18, message: '长度在 6 到 18 个字符', trigger: 'blur' }]
      }
    }
  },
  methods: {
    // 重置表单
    resetLoginForm () {
      this.$refs.loginFormRef.resetFields()
    },
    // 登录处理
    login () {
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) return
        // 发请求
        const { data: res } = await this.$http.post('login', this.loginForm)
        console.log(res)
        if (res.meta.status !== 200) {
          return this.$message({
            message: '登录失败',
            type: 'error'
          })
        }
        this.$message.success('登录成功')
        // 1.把token保存起来
        window.sessionStorage.setItem('token', res.data.token)
        // 2.跳转主页
        this.$router.push('/home')
      })
    }
  }
}
</script>
<style lang="less" scoped>
    .login_box {
        height: 100%;
        background-color: aqua;
    }
    .login_form {
        width: 450px;
        height: 300px;
        background-color: #ffffff;
        border-radius: 4px;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%,-50%);
    }
    .login_form .logo {
        position: absolute;
        left: 50%;
        transform: translate(-50%,-50%);
        width: 140px;
        height: 140px;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        background-color: #fff;
        img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
        }
    }
    .login_form .el-form {
        position: absolute;
        bottom: 0;
        padding: 0 20px;
        width: 100%;
        box-sizing: border-box;
    }
    .btns {
        display: flex;
        justify-content: flex-end;
    }
</style>
